Username aliases don't support backslashes (BB-6685)

Hi,

I've got a TFS repo that I'm keeping synchronised with bitbucket for a few weeks as we are transitioning from TFS to bitbucket.

The problem is that with TFS we were using Windows authentication and so all our commits (incluing for our history) are comming in the format DOMAIN\username. This is fine and I was planning to just add aliases in bitbucket to bridge the gap. However, when setting up and alias in bitbucket the backslashes get converted to forward slashes when saving, so the new aliases don't end up matching anything.

This is a minor bug but still annoying, especially when those usernames then get propagated to Bamboo.

Thanks